From: wolverine01@charter.net   
      
   On 1/25/2026 8:42 PM, Paul wrote:   
      
   ---snip---   
      
   > #  In Summary   
   >   
   > Windows Update’s “slow phase” is dominated by:   
   >   
   > | Stage                   | What Happens                            | Why It   
   is Slow                   |   
   > |-------------------------|-----------------------------------   
   -----|----------------------------------|   
   > | Manifest parsing        | Load thousands of XML manifests         | Many   
   tiny files, heavy parsing   |   
   > | Supersedence evaluation | Compare each component to WinSxS        | Graph   
   traversal, pointer chasing |   
   > | Applicability rules     | Evaluate prerequisites and dependencies |   
   Constraint solving               |   
   > | Transaction planning    | Build install plan                      | Large   
   metadata structures        |   
   >   
   > This is fundamentally a **metadata computation problem**, not an I/O problem.   
   >   
   > Your observation about L3 cache is spot-on: the workload is me   
   ory-latency-bound.   
   >   
   > *********************  End: CoPilot Answer  ************************   
   >   
   >     Paul   
      
   Thanks for the very interesting work to show us exactly what the process   
   all involves.  Very informative and helpful!   
      
      
   --   
   Science Doesn’t Support Darwin. Scientists Do   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)